Lauderia annulata
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| Taxonomic Group: | Diatom |
| Trophic Status: | Autotrophic |
| Size Range: | 25-27.5 ?m wide x 36-47.5 ?m long (LUMCON Guide); 28-47 ?m wide (Cupp 1943); 24-75 ?m wide (Horner 2002, Tomas) |
| Key Characteristics: | Cells cylindrical, slightly longer than wide; valves rounded at the margins, with numerous strutted processes of varying lengths; cells in thick straight chains, touching by their valve surfaces; numerous small chloroplasts |
| Confused With: | |
| Toxin: | None known |